October 22, 2008

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Revision as of 17:46, 23 October 2008 by Oborn (talk | contribs) (→‎Run 229)
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Unpolarized Measurents:

A 2x4x8" aluminum brick was placed at the HRRL export in order to destroy the photon polarization. Rate measurements were made with the descriminator and HV settings used the past week. Then the constant fraction descriminator was replaced with a threshold descriminator on two detectors but not the reference detector.

Default HV and CF descriminator

Matched HV and Threshold Descriminator

2 Runs were taken with the following settings

100 ms Threshold descrimnaotr

[math]HV_{Det A}[/math] =

[math]HV_{Det_C}[/math] =

Run 229


Run 234

File:Run234 Nai Spectrum.jpg